There is alot going on in a lap, in fact there is alot going on in every corner! It’s easy to get overwhelmed by the information you are having to process so try to recognise if its all getting too much. There are a number of ways you might recognise this: your laptimes may have stagnated; you can’t remember what your previous experience of the oncoming corner was but as soon as you brake and turn in you know you are repeating the same mistake or; if your engineer asks you to describe the handling of the car you can only use vague impressions rather than a detailed analysis of each corner.
If you find yourself in this position, try to take a step back and go back to basics. Imagine you are driving the circuit for the first time and look at it with new eyes. Don’t try to break the lap record for a couple of laps and let your brain re-set to the core of what you are doing: pick the important corners, look at where you need to get on the power on the exit of each bend, think about how to get there with one fluid deceleration and make sure your lines are spot on. Once you’ve had that little ‘think’ start to wind up the pace again and I suspect you will be alot clearer headed and probably faster as well.